Battery not functioning

[Levoqd]

Haven’t flown my Mavic Pro 2 in some time. I went to charge the battery but nothing lights up. It’s like it went into a deep sleep mode. How do I get it charged or woken Up?

 

[THE CYBORG]

Found this but don't know if it will work.

Hibernation mode :
It is important NOT to alter the sequence :
1. Switch on battery - ignore what happens with lights etc.
2. LEAVE IT ALONE for at least 5 minutes.
3. Do NOT touch power button - plug into DJI Charger.
4. LEAVE IT ALONE .. it may be hours before it wakes up ... DON'T TOUCH IT !